Fuel injecting device for internal combustion engines



NOV. 1931- N. J., E. HELLSTROM 1,833,743

FUEL INJECTING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Feb. 19,1930 atmosphere;

" formed in the casing.

Patented Nov."2 4, 1931 l to that type of; such devices] whichcomprisesa non-rotatable casing to be particularly '5 inserted into thewall of the combustion chamber of the engine and a stem rotatablyamounted in said casing which carries a spraying nozzle andis formedwith 'a fuel passage communicating with the discharge orifice ororificesof said nozzle and whichis supplied with fue through an inlet passageformed in the casing;

J The invention has rvide an injecting device of the above said typein'which the stem ismounted in the cas ing insuch a wayas posltiyelyjtoprevent leakage between the stern and-the casing in the directiontowardsthe combustion chain} 7' direction towards the w her as well asin the The invention is characterized, chiefly by the-fact'that therotatable stem; COIIlPl'lSGS two parts longitudinally movable relativelyto each other and providedl withsuitablel packing surfaces at oppositesides of thefilel inlet of the casing; In order to produce the} p gui ma Ventleakageboth inwardlyjtowards the'com againstseats Y *atmosPhere. f80 necessary packing pressure a serted between the two parts of thestem'to press said packingsurfaces Inthe drawing a longitudinalsectionpi e fuel injecting device embodying this 'inVen-- tionis shown. Withreferenc engine.

40 1 is a stem comprlsingtwo parts 4, 5flying relatively to each other;i Vented from rotation with respect to ;.each

chamber'carries a spraying nozzle6 which may be directed to the side, asshown, or in any oblique position, as may be desired or w required. Theother part 5 pf the stem-carw ries ahandle 7. V The part llisformedwi'th 1 ms:swam

inns JOHAN moor: ammett or no ArrAn-,-;swnnnn- 1 isage "8.1 g-The abovesaid cenneetie between g,

{the parts I 4* and 5- is" effected by engagement between aj reduced endportion" 6f fthepart. 5 formed with longitudinal ribs and-a "sleeve fltheiparts 4L andfa awayfrorh each other; The

for its purposetolpro H V p p g a 'ofthe sleeve to serveaspackingsurfaces i action of the spring linserted betweenthe it I i i il partsl ands;

e to the drawingathe nuf 35 meral l indicatesa sleeve adapted tobe non:

rotatably insertedin the wall 2 of the com-f bustio'n chamberofaninternal combustion] The sleeve 1 is formeduwith a fuel. inlet atS,4 Rotatably mounted in the sleeve.

end ofsaid'pipe; 1 1;.

, permit them to other. The part ladjacent the combustion I 5,694;sweat. mas-("3 192 s fegtnd g fuelf'pas shapedend portion eoottheniparte'formed U a with corresponding 'g- 'novesi"f Forined;in'thev 1 parts& and 5 in communication wijththeiiflet 3"isacircularggrooveytofireceiye a-"heli'cal spring of high tens on? tendingto disparate" parts t and 5 are formed with conical ends- I 10f, 11,respectively,"near therespective'ends onwith orr spondingconical seats aV plugQO ofthe sleeve, respectively;- The parts h .5 4,5arepressed'against-saidseats due' tothefl Providedatthe endsjoftheparts/l;5 fac a ing eagh other} is' a sufficient play to allo w g i ii i gfree entranceof theffuelfi from inlet;::3 topassage 8' and toallowtheliparts 4 and'y'5' to: h a i Qadjustthemselves relative atheirrespectiye 1 f l jseatsindependentlyof eachother. I This will asecure a; positive sealing effect soasto: prebustion chamberand*ontwardlytowards the v In ordertopreyent passage 8isprovidedwithanon return Valve 1 1 comprisingapipe 12insrtedinthepassage f 8 and aL'springlOaded M11113 engagingv the? I 1. Afuelifljilting devile intim j as; bust on en'gines ,"oonj1prisingsleeve-shaped casing havingseats at. opposite sidesof afuel i v inlet, astem rotatably mountedinsaid casing, 0.

in alinement and so connected-to each other} as to be capable oflongitudinal displacement while beingfpre- "tween: the parts-of the.stem topressthem' against their res pective seats, a handle on V i ioneof; saidparts outsideone end ofithe Gas-Q l ing, a sprayingno'zzle'carriedby the other partofthe stenioutside th -em r ed? r-tiie 9casing, said: nozzle directed substantially "at right ang'les with thestem; a fuel channel in" V the part of the's'tem carrying the nozzle;and e non-return Valve-in said passaiggga V Y 2. Afuelinjecting-devicefor internal-com "bus'tion engines, comprising a sleevelshaped V casing having a fuel inlet between its'nds5; stem fotatably'nioiuicedinsaid -caeing; aidf 5 I, ,ff s t e'm cbmpfisinggt'wfo partslying i'ii a lin'ei V e ,10 ment',?a co nneetioh;between said stem partstd allbvqfreldtive lengitudihel'diplacemerih thereof hilepreventingtheinfroni' otatie n e 7 "relatively to emih other,said parts projectingbeydnd-oppositelends 0 f theeasing; afspray- V. 1 e 15. :ihg nozzlcarried by the rojecting end of? goneqfzsaidpertssdfas to extendsubstantially; a p I fgat i'ight alhg-lestherefio a handle;v Carried e jthe pi'qjectingehdOf the'other part5'sealing I sprfaees 5011, fsaidpartsl atfepposite Sides" of; is I 1 {said fuel inlet, seatsfqrmedinfseideasingen- V gaged by s aid seeling surfacegepd aJspring "linserfied-hetweeh the-parts to press their seaL f spirfacesagainst/lsaidseats; I s e I In testimony whereof -I havexs igned my ampsJOH AN Enocn HELLSTRGM.

